Seven people were arrested on Friday in the southeast state of Victoria, Australia for reportedly planning to use explosive devices near Melbourne landmarks on Christmas Day, according to the Guardian. Five remain in custody.

"We believe we have neutralized that threat," Victoria Police chief Graham Ashton said in a press conference. "We believe there was an intention to conduct what we call a multi-mode attack, possibly on Christmas Day, with possible locations that we've been working on."

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St. Paul's Cathedral, a Melbourne church constructed in 1852, was on the group's list of targets, Ashton said.

“The attack that we will allege was being planned, we believe was going to involve an explosive event, the use of explosives, and we gathered evidence to support that,” he added.

Ashton said that the suspects were "self-radicalized" but inspired by Islamic State ideals.